Push hard to open it.
SCIENCE OBSERVE · WARM-UP3 min
We use force every day and barely notice
Push it, pull it—where is the force?
Pushing a door, pulling a drawer, rolling a cart, sticking magnets—today we find the invisible force.
🤜 Push🤛 Pull🧲 Magnet🛝 Friction
STOP 1 · FIND FORCE5 min
Pushing and pulling are both using force
Which of these actions use force?
Pull hard to move it.
Press down to bounce it.
Summary: anything that moves or changes shape uses force.
STOP 2 · WHAT FORCE DOES6 min
Force starts still things and stops moving ones
What can force change?
A still cart moves when pushed.
A running friend stops when blocked.
A flying ball turns when hit.
Bike brakes use force to do what?
STOP 3 · MAGNETISM6 min
A pull that works without touching
A magnet pulls an iron nail without touching it.
Pulls nails and paper clips.
Does not stick to wood or plastic.
Can pull through paper.
Magnetism is an invisible force that works at a distance.
STOP 4 · FRICTION6 min
Ice is slippery, but shoe tread grips
Why do shoe soles have treads?
Shoe treads are made to?
STOP 5 · SPOT IT6 min
Force is everywhere
Which one relies mostly on friction?
Which example relies mainly on friction?
STOP 6 · TRY IT5 min
Feel three kinds of force with your body
Follow the teacher and do three little moves.
🤜 Push a wall: feel the push🤛 Pull hands: feel the pull🖐️ Rub hands: feel friction warm up
Rub your hands—are they warm? That is heat from friction.
FINISH · SHARE3 min
🤜
You know the secret of force
Push and pull are force; force starts, stops, and turns things; there is magnetism and friction.
Push, pull, attract, friction.
Changes motion and speed.
Tonight, find 3 places at home where friction is used.